1996

7.7

2007

7.9

1980

7.4

2018

6.4

2007

7.5

1931

6.8

1935

5.0

1998

7.2

2007

7.3

2004

6.9

1987

7.5

2002

6.7

1964

6.8

1995

6.5

1991

9.3

1983

6.3

2006

5.5

1992

6.7

2021

7.2

2007

7.9